Step 1

Place the fish, garlic, oil, cumin, paprika and cayenne pepper in a large bowl and toss to combine. Season with pepper.

Step 2

Place a large non-stick frying pan over medium-high heat. Add half the fish and cook, turning occasionally, for 4-5 minutes or until just cooked through. Transfer to a plate and cover with foil to keep warm. Repeat with the remaining fish.

Step 3

Add the onion and celery to the pan, and cook, stirring, for 2-3 minutes or until the onion softens slightly. Add the pumpkin and zucchini and cook, stirring, for 1-2 minutes or until tender.

Step 4

Meanwhile, place the couscous in a large heatproof bowl and pour over the boiling water. Cover and set aside for 5 minutes or until all the liquid is absorbed. Use a fork to separate the grains.

Step 5

Add the fish, pumpkin mixture and coriander to the couscous and gently toss until well combined. Divide the couscous mixture among serving bowls and top with a dollop of yoghurt to serve.